Thanks for your comments. What you mention is indeed a problem, and that is the non-uniform scattering of light in a droplet of water. Well, it turns out that this problem can indeed be turned to an advantage. You can use this to produce walls that are only visible from one direction but not the other, and this is indeed a good way for producing "opaque" objects, not "translucent" objects as you see in our demo. If you are interested, I'd be glad to have a discussion with you about these matters, mressl@gmail.com.

You are right on track. 100 projectors is the minimum number of projectors that make individual rays so dim as to make them invisible, so you only see the projected volume.
You'd need 500 projectors, to get good rotational resolution.

Hugh Pickens writes writes: "There has been much speculation regarding the cause of the recent worldwide economic recession, but we all know the truth. It was 'Angry Birds' and its effect on the productivity of the global work force. The 50 million individuals who have downloaded 'Angry Birds' play roughly 200 million minutes of the game a day, which translates into 1.2 billion hours a year, more than ten times the 100 million hours spent creating and updating Wikipedia over the entire life span of the online encyclopedia. Why is this seemly simple game so massively compelling? Charles L. Mauro performs a cognitive teardown of the user experience of Angry Birds by reverse engineering the game to determine what interaction attributes the successful interface embodies that result in a psychologically engaging user experience. To summarize Mauro's detailed analysis, success is bound up in slowing down that which could be fast, erasing that which is easily renewable, and making visual that which is mysterious and memorable. "Over the past 10 years, our firm has conducted user engagement studies on hundreds of user interfaces. The vast number did not get one principle right, much less six," writes Mauro. "You go Birds! Your success certainly makes others Angry and envious.""

Diggester writes: "To some it might not be a big deal, but to most of us the choice of a browser does matter. Though Microsoft’s Internet Explorer has been with us for a long time, but people are now trying their luck with the browsers offered by Google and some other companies as well.

Internet Explorer has been the most popular web browser for more than a decade now, but the results for October speak of its demise and rise of Chrome as the new king of Browsers after overtaking Firefox. Keeping in mind that IE have been earning majority market share since its advent, reaching its best as 95 percent share in 2004 and declining ever since."

Hugh Pickens writes writes: "James Fallows writes tongue in cheek that U.S. Department of Fear, led by Secretary of Fear Malcolm P. Stag III, is running a poll. What should we re-name the Department of Homeland Security? "Possibilities include Department of ScaredyCatLand Security, reflecting the prevailing mentality of an era, and Department of Fatherland Security, to make us sound strong," writes Fallows. "There are many more to choose from, plus you can write in your own nominees. But act now, because the polls close in two days.""